FR550
3-8
4)
The module should click into place with the retaining clips at each end of the socket
snapping behind the module to secure it.
5)
To release the memory module push both retaining clips outwards and carefully rock the
module forward.
IMPORTANT: Do not use SIMM that use an extra TTL chip to convert the memory module
from asymmetric to symmetric.
3.2.4
DIMM (Dual Inline Memory Modules)
The FR550 mainboard features two 168-pin DIMM sockets with each supporting 8MB to
64MB of SDRAM/EDO using 1MBx64, 2MBx64, 4MBx64 and 8MBx64 DIMM
(Asymmetrical single and double sided). The DRAM interfaces on a 64-bit wide, data path.
Also supported is 3.3 volts 66.67Mhz unbuffered Synchronous DRAM (SDRAM) and 3.3V
volts 60ns or faster unbuffered EDO DRAM. The EDO DRAM and SDRAM are defined
below.
3.2.5
DIMM Combination
Type
Capacity
Organization
DIMM
Clock Speed
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
8MB
1Mx64
1Mx16
1bank
(DIMM1 or 2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
16MB
2Mx64
1Mx16
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
16MB
2Mx64
2Mx8
1bank
(DIMM1or 2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
32MB
4Mx64
2MBx8
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
EDO DRAM DIMM with
serial presence detect
64MB
8Mx64
2MBx8
2banks
(DIMM1&2)
60ns
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
8MB
1Mx64
1Mx16
1bank
(DIMM1 or 2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
16MB
2Mx64
1Mx16
2banks
(DIMM1&2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
16MB
2Mx64
2Mx8
1bank
(DIMM1 or 2)
66.67Mhz
168-pin 3.3V unbuffered
SDRAM DIMM with serial
presence detect
32MB
4Mx64
2MBx8
2banks
(DIMM1&2)
66.67Mhz
Содержание FR550
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Страница 47: ...FR550 Documentation Rev Number A02 April 1997...